Pope Francis said today that he doesn't care "if someone is gay [as long as] he searches for the Lord and has good will." If that doesn't make religious anti-gay bigots mad, tell them about this historical fact: the original Christian Church of 100AD actually sacralized the union of people of the same sex.

Annalee Newitz

Gay marriage sounds like an ultra-contemporary idea. But almost twenty years ago, a Catholic scholar at Yale shocked the world by publishing a book packed with evidence that same-sex marriages were sanctioned by the early Christian Church during an era commonly called the Dark Ages.

Illustration of Serge and Bacchus, in a same-sex union

John Boswell was a historian and religious Catholic who dedicated much of his scholarly life to studying the late Roman Empire and early Christian Church. Poring over legal and church documents from this era, he discovered something incredible. There were dozens of records of church ceremonies where two men were joined in unions that used the same rituals as heterosexual marriages. (He found almost no records of lesbian unions, which is probably an artifact of a culture which kept more records about the lives of men generally.)

Bolstered by this evidence, Boswell published a book in 1994, the year before his death from AIDS, called Same-Sex Unions in Pre-Modern Europe. The book comes out next month for the first time in a digital edition. It was an instant lightening rod for controversy, drawing criticism from both the Catholic Church and sex pundit Camille Paglia. Given the Church's present-day views on gay marriage, these detractors argued, Boswell's history seemed like wishful thinking.

But it wasn't. Boswell had actually begun his research back in the 1970s, and published an equally controversial work in 1980 called Christianity, Social Tolerance, and Homosexuality: Gay People in Western Europe from the Beginning of the Christian Era to the Fourteenth Century. His Same-Sex Unions book refined and expanded a lot of what he'd learned over a lifetime of research into primary sources in scattered libraries and archives.

Pictured: Boswell in 1980

How could these marriages have been forgotten by history? One easy answer is that — as Boswell argues — the Church reframed the idea of marriage in the 13th century to be for the purposes of procreation. And this slammed the door on gay marriage. Church scholars and officials worked hard to suppress the history of these marriages in order to justify their new definition.

Of course, history is more complicated than that. Boswell claims that part of the problem is that we define marriage so differently today that it's almost impossible for historians to recognize 1800-year-old gay marriage documents when they see them. Often, these documents refer to uniting "brothers," which at the time would have been a way of describing same-sex partners whose lifestyles were tolerated in Rome. Also, marriages over a millennium ago were not based on procreation, but wealth-sharing. So "marriage" sometimes meant a non-sexual union of two people's or families' wealth. Boswell admits that some of the documents he found may refer simply to non-sexual joining of two men's fortunes — but many also referred to what today we would call gay marriage.

Legal scholar Richard Ante wrote a law journal article explaining that Boswell's book could even be used as evidence for the legality of gay marriage, since it shows evidence that definitions of marriage have changed over time. He describes some of Boswell's evidence of these same-sex rites in the early first millennium:

The burial rite given for Achilles and Patroclus, both men, was the burial rite for a man and his wife. The relationships of Hadrian and Antinous, of Polyeuct and Nearchos, of Perpetua and Felicitas, and of Saints Serge and Bacchus, all bore resemblance to heterosexual marriages of their times. The iconography of Serge and Bacchus was even used in same-sex nuptial ceremonies by the early Christian Church.

The main piece of evidence that these same-sex unions were marriages is that they so closely resembled heterosexual ceremonies. Literary scholar Bruce Holsinger describes Boswell's detailed stories of same-sex ceremonies:

[Boswell] cleverly posits the development of heterosexual and same-sex nuptial offices as a single phenomenon, tracking the growth of the latter from "merely a set of prayers " in the earlier Middle Ages to its flowering as a "full office" by the twelfth century that involved "the burning of candles, the placing of the two parties' hands on the Gospel, the joining of their right hands, the binding of their hands . . . with the priest's stole, an introductory litany crowning, the Lord's Prayer, Communion, a kiss, and sometimes circling around the altar." Boswell devotes a full chapter to comparing these rituals with their heterosexual counterparts, revealing a number of extraordinary similarities between the two; in several appendixes totaling almost 100 pages, he has compiled numerous examples of the documents themselves (including heterosexual matrimony ceremonies and adoption rituals for comparison) to let "readers . . . judge for themselves," as he puts it. (Boswell translates most of the ceremonies, so general readers won't have to worry about brushing up on their Old Church Slavonic.)

Were these same-sex unions in the middle ages the same thing as today's gay marriages? Probably not. People at the time may not have viewed two men forming a union as anything out of the ordinary. Marriage itself meant something different thousands of years ago, and social taboos against homosexuality had not yet solidified. Still, in Boswell's work, we find records of institutions where same-sex couples were honored with the same ceremonies that opposite-sex couples enjoyed. Two men could live as "brothers," sharing wealth, home, and family. And yes, they could love each other, too.

Though Boswell died before his country began to allow similar kinds of unions, he could draw hope from knowing something that most people did not. Even the most fundamental kinds of human relationships change over time. Those who have been banished today may be blessed tomorrow — just as they were over a thousand years ago.